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-rw-r--r--lib/sockunion.c24
-rw-r--r--lib/sockunion.h1
-rw-r--r--lib/vty.c1
3 files changed, 26 insertions, 0 deletions
diff --git a/lib/sockunion.c b/lib/sockunion.c
index 6a40f332..d1f6d80b 100644
--- a/lib/sockunion.c
+++ b/lib/sockunion.c
@@ -527,6 +527,30 @@ sockopt_ttl (int family, int sock, int ttl)
return 0;
}
+int
+sockopt_v6only (int family, int sock)
+{
+ int ret, on = 1;
+
+#ifdef HAVE_IPV6
+#ifdef IPV6_V6ONLY
+ if (family == AF_INET6)
+ {
+ ret = setsockopt (sock, IPPROTO_IPV6, IPV6_V6ONLY,
+ (void *) &on, sizeof (int));
+ if (ret < 0)
+ {
+ zlog (NULL, LOG_WARNING, "can't set sockopt IPV6_V6ONLY "
+ "to socket %d", sock);
+ return -1;
+ }
+ return 0;
+ }
+#endif /* IPV6_V6ONLY */
+#endif /* HAVE_IPV6 */
+ return 0;
+}
+
/* If same family and same prefix return 1. */
int
sockunion_same (union sockunion *su1, union sockunion *su2)
diff --git a/lib/sockunion.h b/lib/sockunion.h
index 96b9a0d4..db145cf2 100644
--- a/lib/sockunion.h
+++ b/lib/sockunion.h
@@ -99,6 +99,7 @@ extern int sockunion_accept (int sock, union sockunion *);
extern int sockunion_stream_socket (union sockunion *);
extern int sockopt_reuseaddr (int);
extern int sockopt_reuseport (int);
+extern int sockopt_v6only (int family, int sock);
extern int sockunion_bind (int sock, union sockunion *,
unsigned short, union sockunion *);
extern int sockopt_ttl (int family, int sock, int ttl);
diff --git a/lib/vty.c b/lib/vty.c
index bd1dbac0..e403159b 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -1816,6 +1816,7 @@ vty_serv_sock_addrinfo (const char *hostname, unsigned short port)
if (sock < 0)
continue;
+ sockopt_v6only (ainfo->ai_family, sock);
sockopt_reuseaddr (sock);
sockopt_reuseport (sock);